rupakraj

Using Select(): a power of LINQ for casting datatable into List of Object


List<Student> target = dt.AsEnumerable()
    .Select(row => new Student
    {
        // assuming column 0's type is Nullable<long>
        StudentID = row.Field<long?>(0).GetValueOrDefault(),
        StudentName = String.IsNullOrEmpty(row.Field<string>(1)),
    }).ToList();

rupakraj

var gcm = require('node-gcm');

var notify     = exports;

notify.send = function(msg, reg_id) {
    var message = new gcm.Message();
    message.addData('msg', msg);
    // get token here
    // TODO
    //var regTokens = ['APA91bFiJx52Iq2_LwyXPUWeO0Vg-9DmrWW6E6BmjwNUtTIrWRNOIDzaCmOidzndjZE3zWvL248GtqBYIV7YsD9q37M0urFz3FD6DvYkOaVqJqV3V9CciPletqzbJqvEm-54cpwMNcxP'];

rupakraj

WARNING: its hard reset, means all the data or log will be removed

To reset the django migration to initial follow following order
* Remove database
* Remove all the contents of django app's migrations folder except __init__.py file.
* The remaining migrations folder should be something like
    myapp
      ├── migrations
      │   │   ├── __init__.py

rupakraj

// Found somewhere in website, and updated.

#include <SoftwareSerial.h>
SoftwareSerial RFID(2, 3); // RX and TX

int data1 = 0;
int ok = -1;
int yes = 13;
int no = 12;

rupakraj

# DJango Template Tags Cheat Sheet
## Inheritance and Inclusion

    {% extends "base.html "%}
    {% block content %} ... {% endblock %} or {% block content %} ... {% endblock content %}
    {% include "foo/bar.html" %}
    {% ssi /home/html/ljworld.com/includes/right_generic.html %} 

## Filters and Tags

rupakraj

    private void Timer(){

        final Handler ha=new Handler();
        ha.postDelayed(new Runnable() {
            @Override
            public void run() {
                Debug.Log("Calling data");
                // call your function
                ha.postDelayed(this, 20*1000);
            }

rupakraj

SRC: http://pmt.sourceforge.net/pngcrush/
Issue fixes for : #AAPT: *.png: libpng warning: iCCP: Not recognizing known sRGB profile that has been edited

Use pngcrush to remove the incorrect sRGB profile from the png file:

pngcrush -ow -rem allb -reduce file.png

    -ow will overwrite the input file
    -rem allb will remove all ancillary chunks except tRNS and gAMA
    -reduce does lossless color-type or bit-depth reduction

rupakraj

# lastb : Unsuccessful attempts
# last  : Successful attempts

sudo lastb | sed 's/ \+/ /g'| cut -d' ' -f3 | sort | uniq -c | sort -n
sudo last | sed 's/ \+/ /g'| cut -d' ' -f3 | sort | uniq -c | sort -n 

rupakraj

If we need to make usb stick bootable of windows ISO follow the steps
```
$ sudo apt-get install winusb
```
run winusb comand with appropiate parameters
```
$ sudo winusb --format <ISO file> <desk>
```
Example
```

rupakraj

# OS: Ubuntu

## Basic Configuration
  -- login using ssh
     # ssh root@IP
  -- Update latest updates/security patches
  -- set timezone
     # timedatectl set-ntp true
     # dpkg-reconfigure tzdata
  -- Add new user -